New aromatic tetracarboxylic dianhydride, having isopropylidene and bromo-substituted arylene ether structure 3,3Ј,5,5Ј-tetrabromo-2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride, was synthesized by the reaction of 4-nitrophthalonitrile with 3,3Ј,5,5Ј-tetrabromobisphenol A, followed by al
Soluble Polyimides from a New Dianhydride: 5′-tert-Butyl-m-terphenyl-3,4,3″,4″-tetracarboxylic Acid Dianhydride
✍ Scribed by Carolina García; Angel E. Lozano; José G. de la Campa; Javier de Abajo
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 109 KB
- Volume
- 24
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
A novel tert‐butyl‐containing dianhydride was prepared from readily available reagents. It was reacted with various aromatic diamines to prepare a set of polyimides containing tert‐butyl pendent groups. The resulting polyimides exhibit high molecular weights (high inherent viscosity), and a combination of desirable properties, such as good solubility in aprotic amide solvents and cresols, high glass transition temperatures (up to 320 °C), high thermal resistance, film‐forming capability and good mechanical properties.
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📜 SIMILAR VOLUMES
A new aromatic tetracarboxylic dianhydride having a crank and twisted noncoplannar structure, 2,2Ј-bis(3,4-dicarboxyphenoxy)biphenyl dianhydride, was synthesized by the reaction of 4-nitrophthalonitrile with biphenyl-2,2Ј-diol, followed by hydrolysis and cyclodehydration. The biphenyl-2,2Ј-diyl-cont
## Abstract A soluble polyimide was synthesized from 2,2′‐bis[4‐(3,4‐dicarboxyphenoxy)phenyl]propane dianhydride (BPADA) and 3,3′‐dimethyl‐4,4′‐diaminodiphenylmethane (DMMDA) by a two‐step method, and it had good solubility both in strong bipolar solvents and in common low‐boiling‐point solvents. T
Some polyimide films based on cyclobutane-1,2,3,4-tetracarboxylic dianhydride (CBDA) and aromatic diamines were synthesized to investigate their temperature resistance and percent transmission of light. The preparations of CBDA were investigated; they produced almost 10 times the yield of CBDA in co